I can never remember the brand I buy and don't recognize it in searches. But, I know what shelf it's on. So it must not make any ratings lists, however I always thought it was pretty good sipper for the money. I actually enjoy sipping Tequila. I just don't buy it often. I'm going to check out this Sotol Kiddiedoc mentioned. Sounds interesting.
However, the hispanic that works at the Indian liquor store is very high on Teramana by DWayne Johnson. And Casamigos is rated well for a smooth sipper at a good price point. It's a George Clooney interest/investment. Also Dulce Vida. For a budget blanco in the $25 range rated very well as a sipper there is Milagro silver.
depends on what you are shopping for. 100% pure agave brands will be only agave and the pricer drinks. Your budget stuff getting down to $40 or less may be mostly mixes that are around 50% agave.